Improvement in fastenings for knob-spindles



nQw, TREFETHEN;

FASTENINGS FOR KNOB-SPINDLES.

No.180,Z88.

I mvauturk .HflryW 7159 T" Patented July 25. 1876.

WITNESSES 14$. 5. &

- r N. PETERS, PHOTO LITMQGRAFHER. WASNKNGTON. D, C.

thereon.

HENRY W. TREFETHEN, OF KITTERY, MAINE.

IMPROVEMENT IN FASTENING$ FOR KNOB-SPINDLES.

Specification forming part of Letters Patent No. 180,288, dated July 25,1876; application filed June 2, 1876.

To all whom it may concern:

Be it known that I, HENRY W. TREFETHEN, of Kittery, in the county ofYork and State of Maine, have invented a-new and valuable Improvement inFastenings for Knob-Spindles and Latches; and I do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the same, reference being bad to theannexed drawings, making a part of this specification, and to theletters and figures of reference marked Figure 1 of the drawing is arepresentation of a side elevation of my invention. Fig. 2 is a detachedview of the knob and spindle; Fig. 3 is a detached view of thebearing-plate. Fig. 4, an under side plan view of the locking-plate andFig. 5, a vertical longitudinal section of the locking-plate,bearing-plate, and rosehead.

The object and purpose of the present invention are to provide a simpleand effective means for securely holding the knob-spindle, and preventthe same from being turned, the combination and arrangement of theseveral parts by which the above results are accomplished beinghereinafter described, and subsequently pointed out in the claim.

In the accompanying drawings, A represents a section or portion of adoor to which is secured a mortise latch or look. Connected to the doorA is a bearing-plate, B, encircling the knob-spindle a. This plate isformed with a recessed opening, b, through which the spindle passes, andin which fits and slides a locking-plate, 0, said plate having a raisedbearing-face, c, which rests upon a shoulder.

or flange, d, around the opening I). In the smaller end of the plate Bis an opening, 6, partially divided by a projecting lip, f, said openingbeing designed to receive a stop,'g,'

which slides transversely Within an elongated slot, h, and is operatedby a suitable knob or handle, 7:.

The plate G has an opening, j, partially circular and partially ofirregular form, so that when the plate 0, by the knob or handle 1', isforced upward in an inclined direction, the spindle a will be inposition within the straight portion of the opening,

which constitutes the holding part, preventing the spindle from turningtherein as the sides of the opening meet the sides of the spindle.

When the plate (3 is slid down so that the circular part of the openingencircles the spindle the same'may be rotated and rendered opvfrom'sliding downward. When it is desired, I

however, to bring the plate in position so that the spindle may beoperated, the knob is moved back, disengaging the stop 9 from the lip f,when the plate is moved in position and locked by bringing-the stop inthe lower portion of the slot or opening 0.

A rose-head, I, through which the knobspindle a passes, is secured overthe bearingplate B by suitable screws, and holds the locking-plate 0within the opening I) of the plate B.

The knob-spindle, as shown more clearly in Fig. 2, is secured inposition by means of a pin, m, extending transversely through it on theinside of the lock or latch, and thereby is held in place by theknob-flange, as commonly used, the screws of which are tapped into theside of the lock or latch, instead of extending only into the wood, asis commonly the case.

The pin m prevents the forcing of the knob-spindle through the lock orlatch from the outside by removing the knob and rendering ineffectivethe functions of the slide 0, which secures the knob-spindle in'positionand prevents the forcing back into I the latch or look shell its bolt orlatch, when in position for fastening any object to which it is or maybe attached. v v

Having now fully described the construction and operation of myinvention, what I claim as new, and desire to secure by Letters Patent,is-

The rose-head l bearing-plete B, with opening 1), and opening 0, withlip f, in combination with the locking-plate 0, having opening j, of theform described, encircling the knob-spindle a, and the transversesliding stop 9, constructed to operate as and for the purpose specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

HENRY W. TREFETHEN.

Witnesses:

JOSIAH W. LEWIS, Moses V. 'SAFFoRD.

